What is the weight of `3.01xx10^(23)` molecules of ammonia?

Options

A. 17 gm
B. 8.5 gm
C. 34 gm
D. None of these

Answer

b

Explanation

`6.023 times 10^(23)` molecules of `NH_(3)` has weight = 17 gm
`therefore 3.01 times 10^(23)` molecules of `NH_(3)` has weight
`=(17 times 3.01 times 10^(23))/(6.023 times 10^(23))=8.50gm`